subcoding/test/asm_test.go

package test

import "testing"

import "github.com/firestuff/subcoding/asm"

func TestTooManyOperands(t *testing.T) {
	_, err := asm.AssembleString(`
global_memory_size: 4
function_memory_size: 4
functions:
- - [nop, 0]
`)
	if err == nil {
		t.Fatal("Lack of error when passing operand to nop")
	}
}

func TestTooFewOperands(t *testing.T) {
	_, err := asm.AssembleString(`
global_memory_size: 4
function_memory_size: 4
functions:
- - [mov, g0]
`)
	if err == nil {
		t.Fatal("Lack of error when passing only one operand to mov")
	}
}

func TestIncorrectSigned(t *testing.T) {
	_, err := asm.AssembleString(`
global_memory_size: 4
function_memory_size: 4
functions:
- - [ltu, 0, -1]
`)
	if err == nil {
		t.Fatal("Lack of error when passing signed value to ltu")
	}
}

func TestHex(t *testing.T) {
	prog, err := asm.AssembleString(`
global_memory_size: 4
function_memory_size: 4
functions:
- - [mov, g0, 0xfeedc0de]
`)
	if err != nil {
		t.Fatal(err)
	}

	val := prog.Functions[0].Instructions[0].Operands[1].Value
	if val != 4276994270 {
		t.Fatalf("Mismatch: expected=4276994270, actual=%d", val)
	}
}

func TestBinary(t *testing.T) {
	prog, err := asm.AssembleString(`
global_memory_size: 4
function_memory_size: 4
functions:
- - [mov, g0, 0b100101]
`)
	if err != nil {
		t.Fatal(err)
	}

	val := prog.Functions[0].Instructions[0].Operands[1].Value
	if val != 37 {
		t.Fatalf("Mismatch: expected=37, actual=%d", val)
	}
}